Compound lever-gravitatiug lock or latch foe



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SAMUEL NOYES, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO RHODOLPHUS KINSLEY,OF SPRINGFIELD, MASSACHUSETTS.

COMPOUND LEVER-GRAVITATING LOCK OR LATCH FOR DOORS, &C.

Specification of Letters Patent No. 2,963, dated February 20, 1843.

To all 'whom 25 may concern Be it known that I7 SAMUEL NoYEs, ofBeverly, in the county of Essex and State of Massachusetts, haveinvented a new and useful Improvement in the Construction of Locks,Latches, or Latches for Doors and for other Purposes, called theAmerican Compound Lever- Gravitating Lock and Latch,7 which is describedas follows, reference being had to the annexed drawings of the same7making part of this specification.

Figure 1 is a view Vof the interior of the lock. Fig. 2 is a view of themodilication of the lock or latch. Fig. 3 is a view of anothermodification of the lock or latch. Fig. 4 is a view of the knob-spindle.

The box or case H of the lock and latch may be made in the usual manner.

The latch C forms nearly a right angle on the sides next the front andbottom of the case the catch projecting from the angle thereof, andpassing through the usual mortise in the face-plate of the case. Thelatch or catch is suspended from and vibrates on a pin or pivo-t Ppassed through an aperture in the vertical limb of the latch andinserted into the case. The latch or catch at or near the termination ofthe vertical part through which the aforesaid pin or pivot passes isturned back toward the center of the case forming a tail or arm Cagainst which the weighted vibrating lever B strikes in its ascendingmovement for drawing back or unlocking the catch. The weight of thehorizontal arm of the catch is sullicient to throw the catch out fromthe case and to retain it in that position until raised bythe lever. l

The Alever B for raising the catch or 'drawing it into the case and alsofor returning the tumbler and knob spindle to their usual position, ismade of an irregular ligure weighted at its outer extremity and swingingor vibrating on a pin V which pin or lar convex form (as represented intheV drawings) which present several modifications thereof equally welladapted for raising the latch and for returning the tumbler to itsproper position without the application of weight of the latch as inother locks.

The tumbler A for lifting the weighted lever and with it the latch isplaced against the lever and is perforated for the knobspindle and ismade to lift the lever by turning it either to the right or left.tumbler may be made straight, curved forked or in any convenient form toeffect the operation of raising the lever and receding the catch. Thetumbler and weightedlever thus arranged forms a compound lever.

The catch in receding into the case by the closing of the door actsindependently of the compound lever and thus prevents the fric- Thistion experienced in the use of other locks in which the knob spindle isbrought to its required position by the weight of the latch and theparts connected thereto.

E represents the bolt for locking and E the guard for securing the bolt.

What I claim as my invention and which I desire to secure by LettersPatent isrIhe arrangement of the compound lever in combination with theweighted latch in the manner and for the purpose set forth that is tosay arranging the compound lever so that the weighted latch in recedinginto the case by the closing of the door to which it is applied shallact independently of the compound lever.

Dated at the town of Beverly, Essex county, -Massachusetts, this eighthday o-f December, A. D. 1842.

Y SAMUEL NOYES. Signed in presence of- JOHN I. BAKER,

JOHN A. GREEN.

